Drive Greenhurst Road in summer and you can read the sprinklers right off the siding — a rust-orange band about three feet up, running around the 1990s hardboard lap that covers most of this part of south Nampa. That band, north-side algae and sun-chalked paint are the three things we actually clean out here.
The houses along Greenhurst Road went up in the 1990s, and Nampa builders that decade used LP or Masonite hardboard lap on most of them, with T1-11 plywood sheet on gable ends, garages, and sometimes a whole elevation. Later infill homes have vinyl, and you'll find brick or rock wainscot across the front of the nicer split-levels. That mix decides how a house here gets washed. Hardboard is wood fiber pressed with resin and held together by its paint film — once that film is twenty-five years old and chalked, the board underneath is one bad decision away from swelling. Vinyl takes more abuse but traps mildew down in the lap shadows. We walk every elevation before anything gets sprayed and set the process to the softest material on the house, not the toughest.
Nearly every house out here has it: a rust-orange or brown band three or four feet up the siding on whichever side the lawn heads reach. That is not dirt. It's iron and hard-water mineral out of the well and canal-fed irrigation this whole end of the valley runs on, baked into the paint by sun. Soap won't move it and pressure won't either — you can strip paint clean off a hardboard lap and the stain will still be sitting there, because it's in the surface, not on it. It takes an oxalic-acid rinse applied to the band, given dwell time, then neutralized. We include that treatment on the low band when we see it. If a stain has been reapplied every summer for fifteen years, expect it to lighten a lot, not vanish. Anyone promising it disappears hasn't washed enough of these.
Walk the north and east elevations of a Greenhurst house and you'll find a green-black film, heaviest under the eave, down in the lap shadows, and behind any shrub planted too close to the wall. That's algae and mildew feeding on moisture that never gets direct sun, and it lifts with soft-wash solution and dwell time — no scrubbing needed. Now walk around to the south and west. Different problem. Twenty-five years of Idaho sun has broken down the paint binder, so the surface has chalked: rub it and white powder comes off on your hand. Washing a chalked wall gets it clean, but it will look lighter and slightly uneven when it dries, because loose pigment came off with the dirt. That's not damage and it isn't a mistake — it's the elevation telling you it's ready for paint.
House washing in Greenhurst is a soft-wash: low pressure, the cleaning solution does the lifting, then a gentle rinse. On hardboard and T1-11 that isn't a preference, it's the only safe way. High pressure driven into a hardboard lap forces water past the paint edge into the wood fiber, and the board swells, delaminates, and starts crumbling at the butt joints — usually the bottom course first, since it has already taken the most water off the ground and the sprinklers. T1-11 is worse, because pressure furs the plywood grain and opens the grooves. We keep the wand back off the wall, spray down and out rather than up under the laps, and stay off failed caulk lines and any board that's already soft. Find rot or a butt joint that's let go, and we'll show it to you and wash around it instead of blasting it apart.
Soft-wash house washing is $0.18 a square foot of wall — measured on actual siding, not the house footprint — and it's safe on hardboard, T1-11, vinyl and brick alike. Single-story ranches out here land in a fairly predictable range once we have wall dimensions; split-levels run more for the added height and gable area. It pairs well with window cleaning on the same visit, and the order matters: wash the house first, clean the glass after, so runoff doesn't spot fresh windows. Windows and gutters each start at $199. Memberships come Monthly or Quarterly, no contract, and every visit carries a 7-Day Rain Guarantee. Reflekt was started in 2025 by Hunter Stevens and Ethan Seusy — locally owned, fully insured, 4.9 stars across 115+ Google reviews. Same-day and next-day slots open most weeks. Call (208) 453-6760.
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It will lighten it, usually a lot, but be careful of anyone who says it vanishes. That band is iron and hard-water mineral from irrigation water, driven into the paint film by sun. Pressure does nothing to it. We treat the low band with an oxalic-acid rinse, let it dwell, then neutralize it. On siding that's been sprayed every summer for fifteen years, the deepest staining is in the paint itself and only new paint fully clears it.
No. That's chalking. Twenty-five years of Idaho sun breaks down the binder in the paint, leaving loose pigment sitting on the surface. Rub a sun-side wall with your hand before we ever show up and you'll get white powder on your palm. Washing removes that loose layer along with the dirt, so the wall reads lighter and a little uneven afterward. It's the same paint, just without the chalk on top — and it means the elevation is near due for repainting.
Soft-washing does use a diluted sodium hypochlorite mix — that's what actually kills algae and mildew rather than just knocking it loose. The protection is in the procedure: we pre-wet plants and lawn, keep them wet through the wash, and rinse everything down thoroughly at the end. Greenhurst yards tend to have foundation shrubs planted tight against the siding, which is exactly where the mildew lives, so we plan the water around them before we start.
For most homes here, every two years is honest. The north and east elevations pick up algae faster than the sunny sides, and this open southwest edge of Nampa catches fine field silt off the farm ground year-round. If your house sits shaded by a mature tree or backs up to open irrigated ground, annual makes sense. If it's wide open to the sun on all sides, you can often stretch it — we'll tell you when a wall doesn't need it yet.
Yes, and it's often the right call. On plenty of Greenhurst homes only the north and east walls have real mildew, plus the sprinkler band around the perimeter. The south and west sides are chalked but not dirty in any way a wash fixes. We'll quote the elevations that need it rather than talking you into the whole envelope, and tell you straight if the sunny sides would be better served by paint than by another cleaning.
We keep same-day and next-day slots open most weeks, and Greenhurst is a straight run down from our Meridian base into south Nampa. Windows the same visit works well as long as the house wash goes first — otherwise rinse water and lifted grime run down over freshly cleaned glass. Window cleaning uses 100% pure deionized water and starts at $199. Book at (208) 453-6760 or online.
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